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Finding the Fourth Proportional to 125,355.94, 172,991.23 and 68,767.31

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Solution

The fourth proportional to 125,355.94, 172,991.23 and 68,767.31 is: 94,898.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,355.94 : 172,991.23 = 68,767.31 : x
  2. Step 2: Convert to fraction form
    125,355.94/172,991.23 = 68,767.31/x
  3. Step 3: Cross multiply
    125,355.94x = 172,991.23 × 68,767.31
  4. Step 4: Simplify right side
    125,355.94x = 11,896,141,801.25
  5. Step 5: Solve for x
    x = 11,896,141,801.25/125,355.94
  6. Step 6: Final answer
    x = 94,898.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.